ABSTRACT
An infinite plate on Kelvin foundation subjected to moving loads was employed as the model to study the dynamic response of highway rigid pavement system under running vehicles. Four types of moving loads were considered, including constant and harmonic moving point load and rectangle load. In each case, the analytical solution for the steady-state displacement, a generalized double integral, was developed using Green's function method. Numerical evaluations of these integrals were followed using adaptive integration algorithm and the deflected shapes of the plate were obtained. The effect of load velocity and foundation damping on the deflection distribution, the maximum deflection, and its distance lag were investigated. It is found that there exists a critical velocity in the system which decreases as the foundation damping increases. The distribution and maximum of the deflection induced by moving rectangle load were compared with those induced by moving point load. No significant distinction was found.
